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TP-Link HUB的COL灯代表什么含义？
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HUB所有端口都处于同一个冲突域，COL灯为冲突指示灯，COL闪烁表明出现了信号冲突。一般在网络通信繁忙、数据流量大时HUB的COL灯会出现闪烁，如果HUB长时间COL灯闪烁，建议使用交换机代替HUB。
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